package com.atguigu.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.lang.annotation.Annotation;

/**
 * @author fhs
 * Create by 2025/7/18 13:30
 */

@Component
@Slf4j
public class RtGlobalFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String uri = request.getURI().toString();
        long start = System.currentTimeMillis();

        log.info("请求[{}]开始:时间：{}",uri,start);
        //=================前置逻辑=================

        //接下来开始放行，chain中有非常多的链路
        //Mono是用来访问一个或0个响应式流
        Mono<Void> filter = chain.filter(exchange)
                .doFinally(result ->{
                    //=================后置逻辑=================
                    long end = System.currentTimeMillis();
                    log.info("请求[{}]结束:时间：{}，耗时：{}",uri,end,(end-start));
                });//放行 10s

        return filter;
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
